The Bob Stoops era is over at Oklahoma. The record-setting coach will "pass the baton" to his 33-year-old offensive coordinator after announcing his retirement Wednesday afternoon.

Stoops steps down after 18 years with the Sooners, whom he guided to a national title, 10 Big 12 championships and 14 seasons of 10 or more victories. Oklahoma turns over one of college football's most storied programs to Lincoln Riley, who has been the Sooners' offensive coordinator the past two seasons. Riley interviewed for Houston's head-coaching vacancy last winter and in May received a three-year contract extension through 2019.

He becomes the youngest coach in the FBS at one of the biggest jobs in the FBS.

ESPN reporters Andrea Adelson, Heather Dinich, Mitch Sherman and Chris Low joined me Wednesday to discuss the reason for the move, Riley's immediate and long-term challenges, Stoops' impact and what it all means for Oklahoma and the Big 12.

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